This was sent to me today. You've all seen this sort of thing. It's one of the things that reminds you that you are living in a world that is and is not like previous ones. I knew it was genuine as I don't bank with Barclays but my bank always begins "Dear esteemed customer".
Bonhoeffer uses a similar phrase 'worldly Christianity'. It's J Gresham Machen that I want to line up most closely with. See his Christianity and culture here. Having done commentaries on Proverbs (Heavenly Wisdom) and Song of Songs (Heavenly Love), a matching title for Ecclesiastes would be Heavenly Worldliness. For my stance on worldliness, see 3 posts here.